TLC59291_16 Datasheet, PDF (35/46 Pages) Texas Instruments – 8/16-Channel, Constant Current LED Driver

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TLC59291
SLVSA96A – SEPTEMBER 2015 – REVISED MARCH 2016
8.5.1.6 Function Control (FC) Data
The FC data latch is 16 bits long and is used to adjust output current values for LED brightness, select the SID,
BLANK mode select, the output current for IDM, the output on time for IDM, and power-save mode
enable/disable. When the IC is powered on, the control data latch is set to the default value (E67Fh).The control
data latch truth tables are shown in Table 9 through Table 14.
BCALL (BIT 6:0)
0000000
0000001
∙∙∙
1111110
1111111
Table 9. Global Brightness Control (BC) Truth Table
Brightness Control for all Output with Output Current
Output current of OUTn is set to I_O(LCmax) × 0%
I_O(LCmax) × 0.8%
∙∙∙
I_O(LCmax) × 99.2%
I_O(LCmax) × 100%
BIT 8
0
0
1
1
SIDLD
BIT 7
0
1
0
1
Table 10. SID Load Control Truth Table
SID LOADED TO THE COMMON SHIFT REGISTER
No data is loaded (default value)
LED open detection (LOD) or thermal error flag (TEF) data are loaded
LED short detection (LSD) or pre-thermal warning (PTW) data are loaded
Output leakage detection (OLD) or IREF pin short flag (ISF) data are loaded
BLKMS (BIT 9)
0
1
Table 11. BLANK Mode Selection Table
BLANK MODE SELECTION
SOUT mode, BLANK pin worked as SOUT 8/16 select signal (default)
Enable mode, BLANK pin worked as OUTPUT enable
LSDVLT (BIT 10)
0
1
Table 12. LSD Threshold Voltage Truth Table
LED SHORT DETECTION (LSD) THRESHOLD VOLTAGE
V_LSD0 (0.35 × V_CC typ)
V_LSD3 (0.65 × V_CC typ, default value)
BIT 12
0
0
1
1
IDMCUR
BIT 11
0
1
0
1
Table 13. Current Select for IDM
SINK CURRENT AT OUTn FOR INVISIBLE DETECTION MODE (IDM)
IDM is disabled (default value)
2 µA (typ)
10 µA (typ)
20 µA (typ)
BIT 14
0
0
1
1
IDMTIM
BIT 13
0
1
0
1
Table 14. IDM Work-Time Truth Table
INVISIBLE DETECTION MODE (IDM) WORKING TIME
All outputs are turned on for 17 OSC clocks (0.85 µs typ)
All outputs are turned on for 33 OSC clocks (1.65 µs typ)
All outputs are turned on for 65 OSC clocks (3.25 µs typ)
All outputs are turned on for 129 OSC clocks (6.45 µs tyicalp, default value)
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